Comparison of PTH series sensors
Series Highlights
The PTH series allows precise measurement of atmospheric pressure, temperature, and relative humidity in a single instrument. In addition to these real data, using DracalView or dracal-usb-get, you will have immediate access to the following calculated data: altitude, dew point, humidex, and more!
The Dracal ecosystem provides harmonized data regardless of the number of instruments connected to your system. If you prefer data integration without third-party software (VCP mode), rest assured that your atmospheric pressure, temperature, and relative humidity data will also be harmonized.
Available Instruments in This Series
|
Name |
Temperature (accuracy at 25°C) |
Humidity (typical accuracy at 25°C) |
Pressure (typical accuracy at 25°C) |
Probe Protection |
Probe Cable |
Technical Information |
|
-40°C to 125 °C ± 0.1°C |
0 %RH to 100 %RH ±1.5 %RH |
70 kPa to 110 kPa ± 0.15 kPa |
PET mesh Anodized aluminum |
Silicone |
||
|
-40°C to 70 °C ± 0.1°C |
0 %RH to 100 %RH ±1.5 %RH |
70 kPa to 110 kPa ± 0.15 kPa |
PET mesh |
PVC |
||
|
-40°C to 70 °C ± 0.3°C |
0 %RH to 100 %RH ±2.0 %RH |
70 kPa to 110 kPa ± 0.15 kPa |
PET mesh |
PVC |
Probe Protection
The protection covers the digital sensor probe.
|
Photo |
Protection Type |
Advantages |
Disadvantages |
 |
Aluminum |
Excellent physical protection, extended temperature range |
Slower response time, higher cost |
 |
PET Mesh |
Good protection, low cost |
Slightly slower response time |
Probe Cable
|
Photo |
Material |
Advantages |
Disadvantages |
 |
PVC |
Standard low-cost cable type, medium temperature range. |
Unsuitable for extreme temperatures. It can crack if bent at low temperatures. |
 |
Silicone |
Resistant to high temperatures, it remains flexible even at low temperatures. |
Higher cost. |
Particle Filter
All instruments in the PTH series have a particle filter blocking over 99.99% of particles larger than 200 nm, protecting the sensor from dust, soot, and other contaminants.
Examples of Use for Each Instrument
|
Name |
Image |
Advantages |
Application Examples |
|
PTH450 |
 |
High-temperature resistance + High precision |
Use case pipette calibration
Climatic chambers |
|
PTH420 |
 |
High precision |
Use case laboratory condition control |
|
PTH200 |
|
All-in-one instrument |
Case study with AVL |
User Manual and FAQ
1- Can the probes be submerged in water?
No, the probes of the PTH series are not waterproof. These USB instruments measure air components.
2- Can I use the instrument within the probe's operating range, even though the cable and housing's temperature range is 0°C to 70°C?
Yes, but be careful to place only the probe in more extreme temperature conditions.
3- Can I use two PTH instruments to know the pressure difference between two points?
No. The optimal accuracy of a PTH is 0.15 kPa. Therefore, the two accuracies must be added together to obtain the measurement accuracy (0.3 kPa), making it somewhat imprecise compared to a differential pressure measuring instrument.
4- What is the advantage of a PTH over a TRH?
The TRH series measures temperature and relative humidity with the same accuracy as the PTH series. The advantage of the PTH series is measuring atmospheric pressure, a key component that influences relative humidity and, therefore, the dew point. The dew point varies depending on ambient temperature and is critical for the electronics of your measuring instrument.
5- Besides the operating temperature range, how is the PTH450 superior to the PTH420 since they have the same accuracy?
The PTH450 has an anodized aluminum probe and a silicone cable, making it much more robust at extreme temperatures than the PTH420.
6 - Where is the barometer located in the PTH?
The barometer is in the blue housing.
Need More Information?
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